Method of forming metal parts from tubing



Patented Dec, 1,4, v1926e VIIE'HILIE' L. JOHNSN, OF WALLINGFORD, CONNECTICU'J, j-kSSIG'rlSIGEv TO B. W'illiLLl-XCE &

SONS MFG. CO., OF WALLINGFGRD, OONNECTICUT, A CQ12,130ll':h-X'.JIl()N.``'

MEv'rHon or FORMING METAL rAnfrs rnoivr'ru'nrno.

Application filed. March 18, 1926. Serial No. 95,675.

Fig. 1 is a vplan view of a part ofhollow-`V were formed in accordance with my method.

Fig. 2 is a side View, partly in section, of

i the same. i v f 5 Fig. 8 is a perspective view of a ring cut lfrom a piece of tubing.

Fig. 4 is a perspective view of a section ofV culty of forming'the blank'and operating' the blank from thiclrstock, the costr .is .exces-` sive. The objectofthis invention is to'l form these parts fromsections of'a. metal tube, the

25 length of the sections and'the thicknessof the metal from which the tube is vformed depending upon the article to be produced.

p In 'carrying out-my method, I'cut ring 10 from the endof a piece of metal ftubing 30 11, the thickness of* the 'tubing and the lengthv of the ring cut off depending upon the article to be produced. This ring'` is then placed between suitable dies 12 and 13, and is struck to the desired shape,-for instance, that '35 shown in' Fi'gs. 1 and 2 of the dra'wings,

Whcr'ein va foot 14;` is shown.,r

VThe extern-al diameter of the upper portion of the ringjis reduced and thel metal forced .into the lower portion, which is thereby thickened and also expanded in diameter, so that the rings are given the desired ornamental external configuration.. These 'feet rare used as bases for metal vessels. i

llVith this method, theamount of material required for the finished article can be lso closel'y estimated that there is practically no flash after the pressing Operation and, consequently, practically no- Waste of metal, as is the case in Working up sheet-metal. The rings are readily produced by cutting a tube,

and avods the cost of blanking-dies, which for heavy sheet-metal are expensive. i

If the finished part'is to be oval, the ring may be struck sidewise to form an oval ring before the primary striking Operation.

I. claim: 'i i i 4 A method'of forming metal parts, consistingin cutting a tube of the desired thickness and diameter into rings and subjectingthe rings rto pressure between 'a pair of dies, whereby the external diameter of therupper portion of the ring is reduced and the metal forced intolthe lower portion, which is thereby thiclrened and alsoexpanded indiameter,v so that the sald rlngs are given the desiredv ornamental external configuration. p

In testimony whereof, I have signed tLis speclfication.

f rr-Iren) LL JoHNsoN. 

